Edgewater Networks 318CC, Owner Assistance Manual

Page: 206 / 213

GB
Pipework - selection of correct method
YOU MUST select the correct method for the
inlet pipework from 2 options and for the outlet
pipework from 4 options, according to whether
the toilet is above or below the waterline, and to
whether it discharges the waste overboard or
into an on-board holding tank.
HAZARD RISK: Bowl Rim Below
Waterline.
USE VENTED LOOPS!
If the toilet is connected to ANY
through-hull fittings, and if the rim of the bowl falls
below the waterline, water may flood in causing the
craft to sink, which may result in loss of life.
Therefore, if the rim of the toilet is less than 8"
(20cm) above the waterline when the craft is at rest,
or if there is ANY possibility that the rim of the bowl
may be below the waterline at ANY time, a
ventilated anti-syphon loop MUST be fitted in any
pipework connected to a through-hull fitting,
irrespective of whether inlet or outlet.
SPECIAL NOTE 1: The smaller bore inlet pipework
is more hazardous than the larger outlet pipework.
Unless there is a ventilated anti-syphon loop in the
inlet pipework, water will flow into the bowl
whenever both the inlet seacock is open and the rim
of the bowl is below the actual waterline.
SPECIAL NOTE 2: Making a loop in the hose
without fitting a vent may be just as hazardous as
no loop at all, because water may syphon over a
loop. It is the vent that actually prevents the
syphon.
HAZARD RISK: Pipework Becomes
Loose.
USE HOSE CLIPS!
If the toilet is connected to ANY
through-hull fittings and if the pipework becomes
disconnected, either from a through-hull fitting or
seacock, or from the toilet or any secondary valve,
water may flood in and cause the craft to sink,
which may result in loss of life.
Therefore the ends of ALL flexible hoses fitted
directly or indirectly between the toilet and ANY
through-hull fitting that may possibly be below the
waterline at ANY time, MUST be secured to the
hose tails to which they are connected, using two
stainless steel worm-drive hose clips.
Pipework - General instructions for all options
YOU WILL need:
Spiral reinforced smooth bore flexible hoses for
both the ¾" 19mm inlet and the 1½" (38mm)
outlet pipework.
Two stainless steel worm-drive hose clips for
every hose tail connection.
Secure the hose runs so that the hoses cannot
move and chafe, and so that they do not exert
any leverage on the hose tail fittings to which
they are connected, as this may cause adjacent
joints to leak.
Avoid sharp bends in the hoses as this may
cause them to become kinked.
Keep all pipework runs as straight and as short
as possible, avoiding rising and falling over
obstructions which creates airlocks.
If it is difficult to fit the hose onto the hose tails
of the toilet or seacocks, lubricate it with water,
or soften the hose by dipping the end in hot
water.
Secure the ends of all hoses to the hose tails
with two stainless steel worm-drive hose clips,
ensuring that all inlet connections are airtight
and that all the outlet connections are water
tight.
Fresh Water Rinse Pipework
YOU WILL need:
A 'T' piece that fits your boat's pressurised
water system pipework.
Install a 'T' fitting in the pressurised cold
water pipework near to the toilet to provide
a ½" (13mm) feed to the Solenoid Valve.
Mount the Solenoid Valve and Syphon Valve
assembly (key 31) in a dry position, on a
vertical surface, with the outlet port facing
DOWN, as close to the Rinse Intake Elbow
(key 3) as possible AND at least 8" (20cm)
ABOVE the Rinse Intake Elbow.
Install suitable pipework between the 'T' fitting
and the ½" (13mm) inlet port on the Solenoid
Valve.
Run ¾" (19mm) hose by the most direct
route from the ¾" (19mm) outlet port on the
Solenoid Valve to the Rinse Intake Elbow.
Raw Water Rinse Pipework - 2 options
Install the Raw Water Rinse pump (key 32) in a
dry position close to the toilet where it will not
be more than 6ft (2m) above the heeled water-
line at any time.
CAUTION: Do not apply flame to the hose. Do not apply
flame or heat to the plastic hose tails on the toilet, rinse
pump or solenoid valve. Do not use oils, greases or
synthetic lubricants. Do not apply sealing compounds to
any hose connections. Do not over tighten hose clips.
Any of these actions may result in cracking or
breakage of the plastic parts.
* * *
* * *
CAUTION! Use lever operated, full bore marine
seacocks and valves. The use of screw-down
gate valves is not recommended.
* * *
CAUTION: Turn off power to the water pressure
system pump, and open cold water taps to
de-pressurise the system.
CAUTION: If you ever connect your water system
to unregulated USA City Water supplies, you
MUST fit or use a Pressure Regulator to prevent
risk of flooding.
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